with the LR pointing into here:
```
00027a04 <_ZN132_$LT$alloc..vec..Vec$LT$T$C$A$GT$$u20$as$u20$alloc..vec..spec_extend..SpecExtend$LT$$RF$T$C$core..slice..iter..Iter$LT$T$GT$$GT$$GT$11spec_extend17hede143f4f552345fE>:
   27a04: b5f0          push    {r4, r5, r6, r7, lr}
   27a06: af03          add     r7, sp, #0xc
   27a08: f84d 8d04     str     r8, [sp, #-4]!
   27a0c: 1a56          subs    r6, r2, r1
   27a0e: 4688          mov     r8, r1
   27a10: 4605          mov     r5, r0
   27a12: 4631          mov     r1, r6
   27a14: f000 f80c     bl      0x27a30 <_ZN5alloc3vec16Vec$LT$T$C$A$GT$7reserve17ha70a98a10c2b775dE> @ imm = #0x18
   27a18: 6828          ldr     r0, [r5]
   27a1a: 4641          mov     r1, r8
   27a1c: 68ac          ldr     r4, [r5, #0x8]
   27a1e: 4632          mov     r2, r6
   27a20: 4420          add     r0, r4
   27a22: f004 f934     bl      0x2bc8e <__aeabi_memcpy> @ imm = #0x4268
   27a26: 19a0          adds    r0, r4, r6
   27a28: 60a8          str     r0, [r5, #0x8]
   27a2a: f85d 8b04     ldr     r8, [sp], #4
   27a2e: bdf0          pop     {r4, r5, r6, r7, pc}
```